1./test/relaxng/tutor11_2_3.xml:3: element card: Relax-NG validity error : Invalid attribute b for element card 2./test/relaxng/tutor11_2_3.xml fails to validate 3
1./test/relaxng/tutor11_2_3.xml:3: element card: Relax-NG validity error : Invalid attribute b for element card 2./test/relaxng/tutor11_2_3.xml fails to validate 3